ASTM_D_6966_-_13.pdf

Designation:D696613Standard Practice forCollection of Settled Dust Samples Using Wipe SamplingMethods for Subsequent Determination of Metals1This standard is issued under the fixed designation D6966;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers the collection of settled dust onsurfaces using the wipe sampling method.These samples arecollected in a manner that will permit subsequent extractionand determination of target metals in the wipes using labora-tory analysis techniques such as atomic spectrometry.1.2 This practice does not address the sampling designcriteria(that is,sampling plan which includes the number andlocation of samples)that are used for clearance,hazardevaluation,risk assessment,and other purposes.To provide forvalid conclusions,sufficient numbers of samples should beobtained as directed by a sampling plan,for example,inaccordance with Guide D7659.1.3 This practice contains notes that are explanatory and arenot part of the mandatory requirements of this practice.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D1356 Terminology Relating to Sampling and Analysis ofAtmospheresD4840 Guide for Sample Chain-of-Custody ProceduresD7659 Guide for Strategies for Surface Sampling of Metalsand Metalloids for Worker ProtectionD7707 Specification for Wipe Sampling Materials for Beryl-lium in Surface DustE1792 Specification for Wipe Sampling Materials for Leadin Surface Dust3.Terminology3.1 For definitions of terms not listed here,see TerminologyD1356.3.2 Definitions:3.2.1 batch,na group of field or quality control(QC)samples that are collected or processed together at the sametime using the same reagents and equipment.3.2.2 sampling location,na specific area within a sam-pling site that is subjected to sample collection.3.2.2.1 DiscussionMultiple sampling locations are com-monly designated for a single sampling site(see 3.2.3).3.2.3 sampling site,na local geographic area that containsthe sampling locations(see 3.2.2).3.2.3.1 DiscussionA sampling site is generally limited toan area that is easily covered by walking.3.2.4 wipe,na disposable towellette that is moistened witha wetting agent.E17923.2.4.1 DiscussionThese towellettes are used to collectsamples of settled dust on surfaces for subsequent determina-tion of metals content in the collected dust.3.3 Definitions of Terms Specific to This Standard:3.3.1 field blank,na wipe(see 3.2.4)that is exposed to thesame handling as field samples except that no sample iscollected(no surface is actually wiped).3.3.1.1 DiscussionAnalysis results from field blanks pro-vide information on the analyte background level in the wipe,combined with the potential contamination experienced bysamples collected within the batch(see 3.2.1)resulting fromhandling.4.Summary of Practice4.1 Wipe samples of settled dust are collected on surfacesfrom areas of known dimensions with wipes satisfying certainrequirements,using a specified pattern of wiping.4.2 The collected wipes are then ready for subsequentsample preparation and analysis for the measurement of metalsof interest.1This practice is under the jurisdiction ofASTM Committee D22 on Air Qualityand is the direct responsibility of Subcommittee D22.04 on Workplace Air Quality.Current edition approved April 1,2013.Published April 2013.Originallyapproved in 2003.Last previous edition approved in 2008 as D6966 08.DOI:10.1520/D6966-13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.Significance and Use5.1 This practice is intended for the collection of settled dustsamples for the subsequent measurement of target metals.Thepractice is meant for use in the collection of settled dustsamples that are of interest in clearance,hazard evaluation,riskassessment,and other purposes.5.2 This practice is recommended for the collection ofsettled dust samples from hard,relatively smooth nonporoussurfaces.This practice is less effective for collecting settleddust samples from surfaces with substantial texture such asrough concrete,brickwork,textured ceilings,and soft fibroussurfaces such as uph